Your problem isn't the initial solution, but in plugging in the initial condition. The equation
should be
You tried too many steps at once in getting to that equation, and then forgot that you didn't actually flip the sign of the RHS.
Could someone please take a look at "#6 (Again)" from the attached PDF file and tell me if something stands out as wrong because I keep getting the wrong answer? If you're lazy (or whatever the reason is) but you see my mistake(s), you don't have to explain to me how to do it but just tell me where the mistake(s) is/are and I will try to figure it out myself.
Any input would be greatly appreciated!
Thanks in advance!
Your problem isn't the initial solution, but in plugging in the initial condition. The equation
should be
You tried too many steps at once in getting to that equation, and then forgot that you didn't actually flip the sign of the RHS.